root { 
    display: block;
}

#body {   
    width: 1000px;
    height: auto;
    margin: 0 auto;
}
#header{
    width: 1000px;
    height: 300px;
    background-image: url(../class/hinhnen/hinh-nen-love-kute15.jpg);
    margin: 0 auto;
    margin-top: 20px;
}
#menu{
    width: 1000px;
    height: 35px;
    margin: 10 auto;
    margin-top: 0px;
    background:blueviolet;
}
#a {
    padding: 0;
    margin:  0}
    
#a li{
    list-style-type:none;
    float: left;

}

#a  li a {

    text-decoration:none;
    width:130px;
    float:left;
    background: blueviolet;
    color: black ;
    font-weight:bold;
    text-align:center;
    line-height:35px;
    margin: 0 auto;
}
#a li a:hover{
    background: yellow;}


#a li li {float: none;
}
#a li ul {
    display: none;
    margin: 0 ;
    padding: 0;
}

#a li:hover> ul {
    display: block;
    
}

#page_body{
    width: 1000px;
    height: 500px;

    margin: 0 auto;
    float: center;
}

